Use Case (had a few earlier as well): If a user "management@cherryarts.org" logs into odash, he lands on the home page, image attached below. As there is no option to select the company from the drop down on top left, and he is not aware about the My account > Business Profile option, so he gets confused.

There are cases when user is unaware that he is an event manage in any other company, so his email id is attached to two different business profiles.

Therefore there should be a drop down option on top left to select the company on the home page also. (Highlighted in the image attached)